boxing means converting value type to reference type and
unboxing means converting reference type to value type.why
we need boxing and unboxing?
Answers were Sorted based on User's Feedback
Answer / uday
We use boxing and un-boxing when we assign a value to an
object and vice-versa.
Ex:
Int i=10;
Object o=i //this is boxing
int j=(int)o; //this is unboxing
When u say boxing, an object box is allocated and then the
value is copied to that box.
When u unbox, the value is copied out of the object box and
copied into storage location.
Is This Answer Correct ? | 13 Yes | 2 No |
Answer / madhu maaydi
some times super class ref is may not available to subclass objects at that time we may go for umboxing, data in the web application travers in the net throuw objects only but not through variables at that time we need to type cast it into equalent obecjt at this time we go for boxing and auto boximg....
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / deepak
actually we need boxing and unboxing to keep more than one type of value type of variables in a common reference type of collection.. so that you can do the common operation in a loop or anywhere else.. by unboxing one by one.. also you can pass that collection to any method.. so you dont need to make many overloaded method for every type of value type..
Is This Answer Correct ? | 0 Yes | 1 No |
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